Note

These commands evaluate the expressions on either side, and return 1 if

 

true and 0 if false.
A Jump Commands

 

 

Goto ~ Lbl

 

 

 

Syntax

Goto n : .... : Lbl n or Lbl n : .... : Goto n (n is an integer from 0 to 9, or a

 

variable name from A through Z.)

Function

Execution of Goto n jumps to corresponding Lbl n.

Example

? → A : Lbl 1 : ? → B : A × B ÷ 2 ^ Goto 1
Important!

A Go ERROR occurs if there is no corresponding Lbl n in the same program

 

where Goto n is located.

 

Dsz (Decrement and Skip on Zero)

 

 

Syntax

Dsz <variable> : <statement 1> : <statement 2> : ...

Function

Decrements the value of <variable> by one. Then if the <variable> value

 

is non-zero, <statement 1> is executed, followed by <statement 2> and

 

everything after it in succession. If the <variable> value is zero, <statement

 

1> is skipped, and <statement 2> and everything after it is executed.

Example

10 → A : 0 → C : Lbl 1 : ? → B : B + C → C : Dsz A : Goto 1 : C ÷ 10

 

Isz (Increment and Skip on Zero)

 

 

Syntax

Isz <variable> : <statement 1> : <statement 2> : ...

Function

Increments the value of <variable> by one. Then if the <variable> value

 

is non-zero, <statement 1> is executed, followed by <statement 2> and

 

everything after it in succession. If the <variable> value is zero, <statement

 

1> is skipped, and <statement 2> and everything after it is executed.

 

 

S

 

 

 

Syntax

1 <expression> <relational operator> <expression> S <statement 1> :

 

<statement 2> : ...

 

2 <expression> S <statement 1> : <statement 2> : ...

Function

This is a conditional branching command. Conditional branching command

used in combination with relational operators (=, ≠, >, >, <, <).

Syntax 1: <statement 1> is executed if the condition to the left of the S command is true, and then <statement 2> and everything after it is executed in sequence. <statement 1> is skipped if the condition to the left of the

S command is false, and then <statement 2> and everything after it is executed.

Syntax 2: A non-zero evaluation result of the condition to the left of the S command is interpreted as “true”, so <statement 1> is executed, followed by <statement 2> and everything after it in succession. A zero evaluation result of the condition to the left of the S command is interpreted as “false”, so <statement 1> is skipped, and <statement 2> and everything after it is executed.

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